PFAS in the tap water of Grenay (Pas-de-Calais): 1 ng/L, 2x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
2× above our health benchmark
0.5 ng/L is our benchmark, not an official limit. Same EFSA method as Sweden, Denmark and the Netherlands, but stricter. It's a yearly average, compared here with the latest check.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 82% of the cities we track
checked on 21 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 21 July 2026
- Water supplier
- VEOLIA ARTOIS DOUAISIS
In Grenay, the 4 most closely watched PFAS (PFAS-4) add up to 1 ng/L (0.001 µg/L) at the latest PFAS check on 21 July 2026. That's 2 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 1 ng/L (0.001 µg/L), below the EU legal limit (100 ng/L). 13 checks since 22 January 2024: PFAS-4 up to 10 ng/L, sometimes below the detection limit, averaging at least 1.1 ng/L over 12 months (non-detects as 0). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Grenay
13 PFAS checks since 22 January 2024, values as published. Samples from 5 communes on the same network: it's the same water, so each one applies to Grenay. Samples come from 2 distribution networks. The trend refers to the network “GRENAY”.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at | Network |
|---|---|---|---|---|
| 1 ng/L | 1 ng/L | Grenay | LIEVIN, GRENAY | |
| < 1 ng/L | < 1 ng/L | Grenay | LIEVIN, GRENAY | |
| < 1 ng/L | < 1 ng/L | Grenay | LIEVIN, GRENAY | |
| < 1 ng/L | < 1 ng/L | Grenay | LIEVIN, GRENAY | |
| 7 ng/L | 7 ng/L | Liévin | LIEVIN | |
| 2 ng/L | 2 ng/L | Angres | LIEVIN | |
| < 1 ng/L | < 1 ng/L | Grenay | LIEVIN, GRENAY | |
| < 4 ng/L | < 29 ng/L | Aire-sur-la-Lys | GRENAY | |
| < 4 ng/L | < 29 ng/L | Beuvry | GRENAY | |
| < 4 ng/L | < 29 ng/L | Beuvry | GRENAY | |
| < 4 ng/L | < 29 ng/L | Aire-sur-la-Lys | GRENAY | |
| 10 ng/L | 12 ng/L | Beuvry | GRENAY |
Show the 1 earlier checks (back to 22 January 2024)
| – | < 1 ng/L | Aire-sur-la-Lys | GRENAY |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. How to read a PFAS result
What the latest check found
The authorities have not published an overall verdict for this water.
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 24.1 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | <0,010 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.12 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.17 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 28.17 °f | no limit | for reference |
| Electrical conductivity | 613 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 32.3 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 14.1 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 21.9 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.15 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Grenay safe to drink?
All the values shown here (21 July 2026) are within the legal limits, but the authorities have not published an overall verdict for this water. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Grenay's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 1 ng/L. The EU limit is 100 ng/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Grenay also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 1 ng/L stays below.
Are PFAS levels rising in Grenay's tap water?
Too few quantified checks to say (2 since 22 January 2024). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Grenay?
The water hardness in Grenay is 28.2 °f (medium). This mainly matters for household appliances and detergent dosing, not for health.
Where does this data come from?
All values come from official publications: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM). Retrieved on 21 September 2026.
Same water network
Same distribution network as Grenay, so in principle the same water.
Nearby communes
The closest to Grenay on this site.
Data source
- Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM)
- https://hubeau.eaufrance.fr/api/v1/qualite_eau_potable/resultats_dis?code_commune=62386
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- LIEVIN, GRENAY
Water report for Grenay
Get new PFAS results for Grenay, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.